The Battle of Aachen was fought between American and German troops between the 2nd and 21st of October 1944. The city was a major defensive stronghold for Nazi Germany and most of the civilians had been evacuated before the battle began. The United States and Germany both lost roughly 5,000 men with a further 5,600 German troops taken as prisoners of war by the US.
German forces maintained a fierce defence over 19 days of fighting despite being heavily out-numbered. Eventually, however, US forces emerged victorious and captured Aachen, making it the first city on German soil to be captured by the Allies in World War Two.